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Amperometric Glucose Sensor with Tetrathiafulvalene as an Electron Transfer Mediator

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Chemical Research in Chinese Universities 1995年第3期11卷 189-194页

作者： Sun, Chang-qing Yang, Xu Luan, Chai-xia gao, Qian Xu, Hong-ding JILIN UNIV DEPT CHEMCHANGCHUN 130023PEOPLES R CHINA

glucose oxidase (GOD) electrode with tetrathiafulvalene(TTF) as an elec-tron transfer mediator is described. By means of Nafion, TTF was modified on aglassy carbon(GC) electrode surface, and glucose oxidase was then immobilized onthe TTF-Nafion film, forming a GOD-TTF-Nafion enzyme electrode. Characteris-tics of the sensor are shown by cyclic voltammetry and constant potential measure-ments. The sensor responds rapidly to glucose, the time required to reach 95% ofthe steady-state current is less than 60s. The sensor displays a sensitive catalyticcurrent response to glucose and can be operated in a potential range in which theoxidation of common interfering species, such as ascorbic acid and uric acid, doesnot occur. The sensor is stable for more than 30 days at 4℃ and plasma glucose assays were correlated with spectrophotometry(,i = 10 , r= 0. 995).

关键词： Tetrathiafulvalene Nafion Biosensor Glucose

Synthesis of Poly(phthalazinone ether ketone) Containing Sodium Sulfonate Groups via Direct Polymerization

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Chinese Chemical Letters 2002年第10期13卷 926-928页

作者： Shou Hai ZHANG Xi gao JIAN Guo qing WANG Wen xia LI Department of Polymer Science&Materials Dalian University of TechnologyDalian 116012

1, 2-Diliydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one(DHPZ) was sulfonated in concentrated Sulfuric acid. Poly(phthalazinone ether ketone) containing pendant sodium sulfonate group was synthesized from sulfonated and pure 1,2-dihydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one, and 4,4'-difluorodiphenylketone. The sulfonated monomer and sulfonated polymer were characterized with FT-IR and H-1-NMR.

关键词： Sulfonation synthesis poly(phthalazinone ether ketone).

Synthesis and characterization of star-comb styrene/butadiene copolymer

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Chinese Chemical Letters 2010年第11期21卷 1370-1373页

作者： qing Min Zhang Chuang Chen Hong xia Zhang Chun qing Zhang Yang Li Xi gao Jian State Key Laboratory of Fine Chemicals Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian 116012 China Liaoning Province Key Laboratory of Polymer Science and Engineering Dalian 116012 China

A novel star-comb styrene/butadiene copolymer（SC-SBC） was synthesized by anionic polymerization and grafting reaction with epoxidized star liquid polybutadiene（ESPB） as coupling *** overall shape of the star-comb macromolecules can be altered by changing the molecular weight and number of the side *** molecular parameters and mechanical properties of the SC-SBC resins were *** notched izod impact strength of the SC-SBC resins are excellent and reach as high as to 239 J/m.

关键词： Anionic polymerization Epoxidation Grafting reaction Star-comb copolymer Side chain

Laws of the Iterated Logarithm for Locally Square Integrable Martingales

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Acta Mathematica Sinica,English Series 2009年第2期25卷 209-222页

作者： Fu qing gao School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China

Three types of laws of the iterated logarithm （LIL） for locally square integrable martingales with continuous parameter are considered by a discretization approach. By this approach, a lower bound of LIL and a numbe... 详细信息

关键词： locally square integrable martingales law of the iterated logarithm

Moderate Deviations for Random Sums of Heavy-Tailed Random Variables

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1527-1536页

作者： Fu qing gao School of Mathematics and Statistics Wuhan University Wuhan 430072 P. R. China

Let {Xn;n≥ 1} be a sequence of independent non-negative random variables with common distribution function F having extended regularly varying tail and finite mean μ = E（X1） and let {N（t）; t ≥0} be a random process taking non-negative integer values with finite mean λ（t） = E（N（t）） and independent of {Xn; n ≥1}. In this paper, asymptotic expressions of P（（X1 ＋… ＋XN（t）） -λ（t）μ 〉 x） uniformly for x ∈[γb（t）, ∞） are obtained, where γ〉 0 and b（t） can be taken to be a positive function with limt→∞ b（t）/λ（t） = 0.

关键词： large deviations moderate deviations extended regular variation Poisson process

A macro-meso constitutive law for concrete having imperfect interface and nonlinear matrix

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Science China(Technological Sciences) 2009年第3期52卷 634-640页

作者： qing Zhang xiaoZhou xia Department of Engineering Mechanics Hohai University Nanjing 210098 China Institute of Construct Guangdong University of Technology Guangzhou 510006 China

The overall behavior of concrete depends on its meso structures such as aggregate shape, interface status, and mortar matrix property. The two key meso structure characters of concrete, bond status of interface and nonlinear property of matrix, are considered in focus. The variational structure principle is adopted to establish the macro-meso constitutive law of concrete. Specially, a linear reference composite material is selected to make its effective behavior approach the nonlinear overall behavior of concrete. And the overall property of linear reference composite can be estimated by classical estimation method such as self-consistent estimates method and Mori-Tanaka method. This variational structure method involves an optimum problem ultimately. Finally, the macro-meso constitutive law of concrete is established by optimizing the shear modulus of matrix of the linear reference composite. By analyzing the constitutive relation of concrete established, we find that the brittleness of concrete stems from the imperfect interface and the shear dilation property of concrete comes from the micro holes contained in concrete.

关键词： imperfect interface matrix nonlinear property variational structure principle macro-meso constitutive law concrete

Prognostic factors and its predictive value in patients with metastatic spinal cancer

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World Journal of Clinical Cases 2021年第20期9卷 5470-5478页

作者： qing-Peng gao Da-Zhi Yang Zheng-Bin Yuan Yu-xia Guo Department of Spine Surgery The Second Clinical Medical College of Jinan UniversityShenzhen 518020Guangdong ProvinceChina Department of Spine Surgery Shenzhen People’s Hospital2nd Clinical Medical College of Jinan UniversityShenzhen 518020Guangdong ProvinceChina Department of Gynecology Shenzhen People’s Hospital2nd Clinical Medical College of Jinan UniversityShenzhen 518020Guangdong ProvinceChina

BACKGROUND The spine is the most common location of metastatic *** a metastatic spinal tumor depends on many factors,including patients’overall health and life *** present study was conducted to investigate prognostic factors and clinical outcomes in patients with vertebral *** To investigate prognostic factors and their predictive value in patients with metastatic spinal *** A retrospective analysis of 109 patients with metastatic spinal cancer was conducted between January 2015 and September *** prognoses and survival were analyzed,and the effects of factors such as clinical features,treatment methods,primary lesions and affected spinal segments on the prognosis of patients with metastatic spinal cancer were *** prognostic value of Frankel spinal cord injury functional classification scale,metastatic spinal cord compression(MSCC),spinal instability neoplastic score(SINS)and the revised Tokuhashi score for prediction of prognosis was explored in patients with metastatic spinal *** Age,comorbidity of metastasis from elsewhere,treatment methods,the number of spinal tumors,patient’s attitude toward tumors and Karnofsky performance scale score have an effect on the prognosis of patients(all P<0.05).With respect to classification of spinal cord injury,before operation,the proportion of grade B and grade C was higher in the group of patients who died than in the group of patients who survived,and that of grade D and grade E was lower in the group of patients who died than in the group of patients who survived(all P<0.05).At 1 mo after operation,the proportion of grade A,B and C was higher in the group of patients who died than in the group of patients who survived,and that of grade E was lower in patients in the group of patients who died than in the group of patients who survived(all P<0.05).MSCC occurred in four(14.3%)patients in the survival group and 17(21.0%)patients in the death group(P<0.05).

关键词： Metastatic spinal tumors Frankel spinal cord injury functional classification scale Metastatic spinal cord compression Spinal instability neoplastic score Revised Tokuhashi score

Market Equilibrium Based on Cloud-edge Collaboration

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 96-104页

作者： Tong Cheng Haiwang Zhong qing xia the State Key Laboratory of Power Systems the Department of Electrical EngineeringTsinghua UniversityBeijing 100084China

Market participants can only bid with lagged information disclosure under the existing market mechanism,which can lead to information asymmetry and irrational market behavior,thus influencing market *** promote rational bidding behavior of market participants and improve market efficiency,a novel electricity market mechanism based on cloudedge collaboration is proposed in this *** market information,called residual demand curve,is published to market participants in real-time on the cloud side,while participants on the edge side are allowed to adjust their bids according to the information disclosure prior to closure *** proposed mechanism can encourage rational bids in an incentive-compatible way through the process of dynamic equilibrium while protecting participants’*** paper further formulates the mathematical model of market equilibrium to simulate the process of each market participant’s strategic bidding behavior towards equilibrium.A case study based on the IEEE 30-bus system shows the proposed market mechanism can effectively guide bidding behavior of market participants,while condensing exchanged information and protecting privacy of participants.

关键词： Cloud-edge collaboration market mechanism residual demand curve strategic bidding

Operation of three parallel AN/AO processes to enrich denitrifying phosphorus removing bacteria for low strength wastewater treatment

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Journal of Environmental Sciences 2006年第3期18卷 433-438页

作者： xia Si-qing LIU Hong-bo State Key Lab of Pollution Control and Resource Reuse Tongji University Shanghai 200092 China.

Three parallel anaerobic-anoxic/anaerobic-aerobic （AN/AO） processes were developed to enrich denitrifying phosphorus removal bacteria （DPB） for low strength wastewater treatment. The main body of the parallel AN/AO process consists of an AN （anaerobic-anoxic） process and an AO （anaerobic-aerobic） process. In the AO process, the common phosphorus accumulating organisms （PAOs） was dominate, while in the AN process, DPB was dominate, The volume of anaerobic zone（Vana）：anoxie zone（Vano）： aerobic zone （Vaer） for the parallel AN/AO process is 1：1：1 in contrast with a Vana：Vaer and Vano：Vaer of 1：2 and 1：4 for a traditional biological nutrient removal process （BNR）. Process 3 excels in the 3 processes on the basis of COD, TN and TP removal. For 4 month operation, the effluent COD concentration of process 3 did not exceed 60 mg/L; the effluent TN concentration of process 3 was lower than 15 mg/L; and the effluent TP concentration of process 3 was lower than 1 mg/L.

关键词： parallel AN/AO process denitrifying phosphorus removing bacteria (DPB) low strength wastewater biological nutrientremoval (BNR)